C. Tromas

École Nationale Supérieure de Mécanique et d'Aérotechnique

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L. Thilly

Université de Poitiers

M. Texier

Institut des Matériaux, de Microélectronique et des Nanosciences de Provence

Anne Joulain

Institut Pprime

V. Audurier

Institut Pprime

J. Woirgard

Université de Poitiers

Julien Godet

Institut Pprime

A. Merabet

Centre National de la Recherche Scientifique

ΟT

Ο. Thomas

Aix-Marseille Université

S. Dubois

Institut Pprime

Patrick Villechaise

École Nationale Supérieure de Mécanique et d'Aérotechnique

Cooperative Institutions

Centre National de la Recherche Scientifique

148

Université de Poitiers

Institut Pprime

École Nationale Supérieure de Mécanique et d'Aérotechnique

Groupe de Physique des Matériaux

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Université Grenoble Alpes

Science et Ingénierie des Matériaux et Procédés

Sorbonne Université

Aix-Marseille Université

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Anisotropy of the elastic and magnetic properties of expanded austenite in AISI 316L stainless steel

C. Tromas J-C Stinville Enric Menéndez Dalmau Patrick Villechaise J. Nogués

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Adhesion Forces between LewisX Determinant Antigens as Measured by Atomic Force Microscopy

Angewandte Chemie International Edition (2001)

C. Tromas Javier Rojo Jesús M. de la Fuente África G. Barrientos Ricardo Garcı́a

The adhesion forces between individual molecules of Lewis(X) trisaccharide antigen (Le(X) ) have been measured in water and in calcium solution by using atomic force microscopy (AFM, see graph). These results demonstrate the self-recognition capability of this antigen, and reinforce the hypothesis that carbohydrate-carbohydrate interaction could be considered as the first step in the cell-adhesion process in nature.

Trisaccharide

10.1002/1521-3773(20010817)40:16<3052::aid-anie3052>3.0.co;2-q

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Citations (124)

Adhesion Forces between LewisX Determinant Antigens as Measured by Atomic Force Microscopy

Angewandte Chemie (2001)

C. Tromas Javier Rojo Jesús M. de la Fuente África G. Barrientos Ricardo Garcı́a

Die Adhäsionskräfte zwischen einzelnen Molekülen des LewisX-Trisaccharids (LeX) wurden in Wasser und in Ca2+-Lösung mit Kraftmikroskopie gemessen (siehe Auftragung). Die Ergebnisse zeigen das Selbsterkennungsvermögen bei diesem Antigen und stützen die Hypothese, dass Kohlenhydrat-Kohlenhydrat-Wechselwirkungen der erste Schritt bei der natürlichen Zelladhäsion sein könnte.

10.1002/1521-3757(20010817)113:16<3142::aid-ange3142>3.0.co;2-k

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Citations (14)

Pop-in phenomenon in MgO and LiF: Observation of dislocation structures

Philosophical Magazine Letters (2003)

Yves Gaillard C. Tromas J. Woirgard

This letter is based on recent progress in the observation of dislocation distributions around nanoindentations by chemical etching. This so-called nanoetching technique is used to determine the dislocation mechanisms associated with the pop-in phenomenon in MgO and LiF. Successive stages of highly controlled chemomechanical polishing have revealed that these dislocations are half-loops lying in the classical slip systems of MgO or LiF. However, they do not extend on the surface in the classical rosette-arms pattern but stay concentrated around the imprint. A mechanism of dislocation interactions, enhanced by the fact that the dislocations are suddenly nucleated in a small volume, is proposed to explain this specific distribution.

10.1080/09500830310001594273

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Citations (52)

Mechanical hysteresis of the MAX phase Ti2AlN: A nano-mechanical testing study

C. Tromas Wilgens Sylvain Anne Joulain L. Thilly Patrick Villechaise

Hysteresis

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Out-of-plane magnetic patterning on austenitic stainless steels using plasma nitriding

Applied Physics Letters (2010)

Enric Menéndez Jean‐Charles Stinville C. Tromas C. Templier Patrick Villechaise

A correlation between the grain orientation and the out-of-plane magnetic properties of nitrogen-enriched polycrystalline austenitic stainless steel surface is performed. Due to the competition between the magnetocrystalline anisotropy, the exchange and dipolar interactions, and the residual stresses induced by nitriding, the resulting effective magnetic easy-axis can lay along unusual directions. It is also demonstrated that, by choosing an appropriate stainless steel texturing, arrays of ferromagnetic structures with out-of-plane magnetization, embedded in a paramagnetic matrix, can be produced by local plasma nitriding through shadow masks.

Austenitic stainless steel

10.1063/1.3453567

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Citations (11)

On the influence of the dendritic structure on the creep behavior of a Re-containing superalloy at high temperature/low stress

Materials Science and Engineering A (2012)

X. Milhet M. Arnoux Jonathan Cormier J. Mendez C. Tromas

10.1016/j.msea.2012.03.041

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Citations (39)

Dislocation modelling in Ti₂AlN MAX phase based on the Peierls–Nabarro model

The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics (2015)

Karine Gouriet Philippe Carrez Patrick Cordier Antoine Guitton Anne Joulain

In this study, we determined the core structure and the Peierls stress of dislocations in Ti2AlN MAX phase. We use a generalized Peierls–Nabarro model, called Peierls–Nabarro–Galerkin (PNG), coupled with first principles calculations of generalized stacking fault (GSF). The GSF calculations show that dislocation glide in the basal plane will occur preferentially between M (here Ti) and A (here Al) planes. Additionally, the results of PNG calculations demonstrate that whatever the dislocation character, dislocations are dissociated in the basal plane, with a dissociation distance below the experimental resolution of transmission electron microscopy observations. Finally, the Peierls stress calculations show that the edge and screw characters are the easiest characters to glide in the basal plane.

Peierls stress

Stacking fault

Glide plane

Basal plane

10.1080/14786435.2015.1066938

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Citations (28)

Study by atomic force microscopy of elementary deformation mechanisms involved in low load indentations in MgO crystals

Philosophical Magazine A (2000)

C. Tromas Jean‐Christophe Girard J. Woirgard

Abstract Nanoindentations have been performed at very low load in (001) MgO single crystals. The surface deformation has been investigated by atomic force microscopy, and the rosette arms pattern, induced by the glide of only a few dislocations, has been observed. Moreover, surrounding steps, oriented along the ⟨100⟩ directions, have been identified and associated with the early stage of the formation of the square shaped slip lines pattern commonly observed in the case of microindentation performed under very high loads. The fine structure of these surrounding steps has been resolved clearly, and a mechanism has been proposed based upon interaction between dislocations belonging, respectively, to edge and screw rosette arms and upon the activation of a ⟨011⟩(211) secondary glide system.

Rosette (schizont appearance)

Indentation

10.1080/01418610008216475

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Citations (29)

Study of the mechanical properties of ceramic materials by the nanoindentation technique

Journal of the European Ceramic Society (1998)

J. Woirgard C. Tromas Jean‐Christophe Girard V. Audurier

10.1016/s0955-2219(98)00083-1

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Citations (58)